// Copyright 2014 Hajime Hoshi
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//     http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

package ebitenutil

import (
	"github.com/hajimehoshi/ebiten"
	"image"
	"image/png"
	"os"
)

func NewImageFromFile(path string, filter ebiten.Filter) (*ebiten.Image, image.Image, error) {
	file, err := os.Open(path)
	if err != nil {
		return nil, nil, err
	}
	defer file.Close()
	img, _, err := image.Decode(file)
	if err != nil {
		return nil, nil, err
	}
	img2, err := ebiten.NewImageFromImage(img, filter)
	if err != nil {
		return nil, nil, err
	}
	return img2, img, err
}

func SaveImageAsPNG(path string, img *ebiten.Image) error {
	file, err := os.Create(path)
	if err != nil {
		return err
	}
	defer file.Close()
	if err := png.Encode(file, img); err != nil {
		return err
	}
	return nil
}